*{
	margin: 0px;
	padding: 0px;
}
a{
	text-decoration: none;
}
ul li{
	list-style: none;
}
.container{
	width: 100%;
	background: #f5f5f5;
}
.top{
	height: 40px;
	background: linear-gradient(to right,rgba(78,170,76,.5),rgba(0,202,133,.5)),#4eaa4c;
}
.top span a{
	color: #fff;
	line-height: 40px;
	margin-right: 12px;
	font-size: 14px;
	font-weight: bold;
}
.top span a img{
	margin-left: 20px;
	width: 24px;
	height: 24px;
	vertical-align: middle;
}
.top span .f_right{
	float: right;
	margin-right: 20px;
}


.header{
	display: flex;
	width: 100%;
	height: 70px;
	background: url(http://www.oschina.net/dist/oschina/tweet/imgs/tweet_header.jpg) no-repeat;
}
.header .box{
	width: 1200px;
    height: 56px;
    margin:auto;
}
.header .box .box_l{
	height: 31px;
	margin: 13px auto;
}
.header .box .box_r{
	float: right;
	position: relative;
}
.header .box .box_r input{
	position: absolute;
	top: -41px;
	right: 0px;
	font-size: .875rem;
    width: 216px;
    height: 30px;
    padding: 0 50px 0 14px;
    color: #111;
    border: 0px;
    outline: 0;
    border-radius: 1.5em;
    background: rgba(255,255,255,.6);
    box-shadow: inset 0 0 0 1px rgba(0,0,0,.1);
}
.header .box .box_r input:focus{
	box-shadow: inset 0 0 0 1px #06ad3d;
    border: 0px;
}
.header .box .box_r .btn{
	position: relative;
    top: -41px;
    right: 0;
    width: 40px;
    height: 30px;
    padding: 0;
    cursor: pointer;
    transition: background .2s;
    border: none;
    border-top-right-radius: 1em;
    border-bottom-right-radius: 1em;
    outline: 0;
    background: url(http://www.oschina.net/build/oschina/components/imgs/icon/ic_search.svg) center center no-repeat;
    background-size: 16px 16px;
}
.header .box .box_r .btn:hover{
	color: #06ad3d;
}
.nav{
	width: 1200px;
	padding-top: 33px;
	margin: auto;
}
.nav .main{
	width: 830px;
	margin-left:0px;
}
.nav .main textarea{
	font-size: 14px;
    line-height: 20px;
    display: block;
    border:1px solid #ddd;
	outline: none;
	width: 830px;
    height: 92px;
    padding: 16px 12px;
    resize: none;
    white-space: normal;
    word-break: break-all;
    border-top-left-radius: 3px;
    border-top-right-radius: 3px;
}
.drop-list li a{
	color: #333
}

.top span .project img,.top span .question img,.top span .mobile img{
	position: relative;
	top: 0px;
	left: -15px;
    width: 6px;
    height: 6px;
    margin-right: -13px;
}
.item{
	position: absolute;
	border: 1px solid #ddd;
	width: 150px;
	z-index: 100;
	background: #fff;
}
.item ul li a{
	line-height: 36px;
    display: block;
    padding-left: 18px;
    color: #111;
    font-size: 14px;
}    
.item ul li a:hover{
	color: #49ac4f;
}


.first{
	margin-left: 84px;
	display: none;
}
.second{
	margin-left: 170px;
	display: none;
}
.third{
	margin-left: 408px;
	display: none;
}
.active{
	display: block;
}


.textform{
	border: 1px solid #ddd; 
}
.textform .f_right{
	float: right;
	font-size: 12px;
    color: #898989;
}
.textform .f_right input{
	font-size: 14px;
    line-height: 26px;
    width: 72px;
    height: 26px;
    color: #fff;
    background: #ffa300;
    padding: 0;
    cursor: pointer;
    border-radius: 2px;
}